High Risk Work Licence - Slewing Mobile Crane C1 (100t) case studies
High Risk Work Licence - Slewing Mobile Crane C1 (100t) · Put your knowledge to work in context.
The Slewing Mobile Crane C1 licence is an Australian high risk work licence for operating slewing mobile cranes with a rated capacity above 20 tonnes and up to and including 100 tonnes. It suits crane operators, rigging crews and construction or heavy-industry workers who need to plan and perform lifts with larger mobile plant. The High Risk Work Licence - Slewing Mobile Crane C1 (100t) case studies are 5 cases and about 2,943 words.
1Tilt-up panel lift beside a live 22 kV overhead line
You are operating a 100 t all-terrain slewing mobile crane on a tilt-up warehouse site. The load chart configuration in use is the main boom with 18 t of counterweight, 12 m radius, giving a rated capacity of 9.4 t.
676 words, about 3 min2Two-crane tandem lift of an asymmetric vessel
A petrochemical shutdown requires a 34 t pressure vessel to be lifted from a horizontal position on the ground and rotated to vertical for installation. The vessel's centre of gravity is not at its geometric midpoint: it sits 4.2 m from the tail end and 7.8 m from the head end, giving a total length of 12 m.
618 words, about 3 min3Outrigger settlement on a backfilled excavation
You are setting up a 100 t slewing mobile crane to lift precast culverts weighing 5.5 t each from a stockpile to a trench. The chosen position places the crane's four outriggers on a surface that includes a 1.2 m deep backfilled excavation, filled eight months ago with un-compacted spoil and capped with 150 mm of compacted crushed rock.
538 words, about 3 min4Personnel lifting in a man basket during a shutdown
During a refinery shutdown, a maintenance planner asks you to lift two fitters in a man basket to a height of 9 m so they can replace a valve on a pipe rack. The basket and its rigging weigh 220 kg; the two fitters and their tools weigh 210 kg.
579 words, about 3 min5Boom tip contact with a low bridge during travel
You are travelling a 100 t all-terrain slewing mobile crane between two work areas on a public road within a construction site. The route passes under a temporary services bridge with a clearance of 5.4 m.
532 words, about 3 min